AUTOSEAL Spill-Proof Technology: Push the button for easy sipping and release for an instant seal Double-Wall Vacuum-Insulated: Stainless steel body keeps drinks cold for 24 hours Hygiene Oriented: Spout cover protects against dirt and grime Button Lock: Ensures the cover doesn’t accidentally pop up Convenient Carry: Integrated handle for comfortable portability Easy To Clean: Dishwasher-safe lid and easy-to-clean design Fits Most Cup Holders: Convenient for travel and everyday use